Process of manufacturing paraffin.



. UNITED STATES PATENT OFFICE.

'J'ULIUS TANN E, OF BOZNIATOW, AUSTRIA-HUNGARY, ASSIGNOR OF 0NE-HALF TO GUSTAVE OBERLENDER, OF BERLIN, GERMANY.

" PROCESS OF MANUFACTURING- PARAIFFIN.

No Drawing.

Specification of Letters Patent. Patented Mar; 5, 1912.

Application filed December 2 1909 Serial No. 530,999.

To all whom it may concern:

Be it known that I, ULIUS TANNE, a sub-, ject of the Austro-Hungarian Emperor, and resident of Rozniatow, Galicia, 'Austria- Hungary, have invented certain new and useful Improvements in Processes of Manufacturing Paraifin, of which the following is a specification.

This invention relates to processes of manufacturing parafiin, and has for its object to accomplish the complete separation of the solid hydrocarbons (paraflin, etc.) contained in various admixtures, such as the residues from the distillation of mineral oil, the tarry residues obtained from the distillation processes applied to wood, peat, soft coal or bituminous slate, and also such as ozokerite,

ceresin, and like products.

It is well known that paraflin possesses a collodial reaction against solvents, (Gonf. Jacobson, Repertom'um, 1890, 2, pages -33 add 34).- For instance in heated solutions made with benzene, chloroform, bisulfid of carbon on-turpentine-oil, the paraffin after cooling. separates out and forms a gelatinous, colloidal precipitate having a flaky appearance. This colloidal conditlon prevents part of the parafiin'which should be easily crystallized from being separated, and this fact explains the small yield of solid hydrocar bons which is frequently obtained when an exact chemical determination of the parafiin in the raw materials will show it to present .peat, soft coal or bituminous slate, from either of'which all water has been removed, is slowly heated and dissolved in benzene containing from 5 to 10 per cent. of glacial acetic acid, the paraffin, after the solution parafiin by cooling :has cooled, separates out in the form of a fine grained sediment. This separation is accelerated by cooling in a refrigerator.

Owing to the difference in the raw materials to be treated, the quantity of glacial acetic acid to be dissolved in the benzene may advantageously vary, from about 5 to 10 percent. of the total mixture, and this amount must be ascertained by an experimenton a small scale.

A specific embodiment of my invention is as follows: Forv example, 100 kgs. of petroleum residues may be dissolved in at least half the quantity of benzene containing 10 per cent. of glacial acetic acid, while being slowly heated. The quantity of the solvent depends on the consistency of the material and if the consistency is great, equal parts of material and solvent must be used. The solution is allowed to cool qu'ite gradually and after twelve hours it is put into a refrigerator. After about fortythe separated fine grained pulp is subjected to pressure; and the pressed paraffin is fureight hours the separation is complete and l ther treated and refined according to the off from this solution, and after the separation of the acetate, the residue "may be utilized for lubricating oils.

The above described acetic acid-benzene process has the advantage over the processes hitherto in use in that the raw material'can be better utilized, that a great deal of time may be saved in the manufacture, and the yield of hard parafiin is considerably increased.

What I claim is 1. In the manufacture of paraflin, the process which comprises extracting material containing paraflin with a solution of acetic 1 acid in benzene and recovering granular the solution formed in the extraction.

2. The process of separating solid hydrocarbons from materials containing the same which consists in extracting said materials by benzene containing an admixture of from 5 to 10 per cent. of acetic acid, cooling the solution obtained in a refrigerator, separat- In testimony whereof I have signed my iifig the precipitate obtained, and pressing name to this specification in the presence of 10 t e same.

two subscribing witnesses.

3. The process of separating solid hydrocarbons from materials containing the same, JULIUS TANNE' which comprises treating such materials Witnesses: with a solution of acetic acid in benzene. and HENRY HAsPER,

refining the precipitate formed. WOLDEMAR HAU'PT. 

